Orange Pi5 kernel

 // SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Powermac setup and early boot code plus other random bits.
 *
 *  PowerPC version
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 *  Adapted for Power Macintosh by Paul Mackerras
 *    Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
 *
 *  Derived from "arch/alpha/kernel/setup.c"
 *    Copyright (C) 1995 Linus Torvalds
 *
 *  Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
 */
 
/*
 * bootup setup stuff..
 */
 
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/export.h>
#include <linux/user.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/bitops.h>
#include <linux/suspend.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
 
#include <asm/reg.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/ohare.h>
#include <asm/mediabay.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/cputable.h>
#include <asm/btext.h>
#include <asm/pmac_feature.h>
#include <asm/time.h>
#include <asm/mmu_context.h>
#include <asm/iommu.h>
#include <asm/smu.h>
#include <asm/pmc.h>
#include <asm/udbg.h>
 
#include "pmac.h"
 
#undef SHOW_GATWICK_IRQS
 
int ppc_override_l2cr = 0;
int ppc_override_l2cr_value;
int has_l2cache = 0;
 
int pmac_newworld;
 
static int current_root_goodness = -1;
 
extern struct machdep_calls pmac_md;
 
#define DEFAULT_ROOT_DEVICE Root_SDA1	/* sda1 - slightly silly choice */
 
#ifdef CONFIG_PPC64
int sccdbg;
#endif
 
sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
EXPORT_SYMBOL(sys_ctrler);
 
static void pmac_show_cpuinfo(struct seq_file *m)
{
<------>struct device_node *np;
<------>const char *pp;
<------>int plen;
<------>int mbmodel;
<------>unsigned int mbflags;
<------>char* mbname;
 
<------>mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
<------><------><------><------>    PMAC_MB_INFO_MODEL, 0);
<------>mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
<------><------><------><------>    PMAC_MB_INFO_FLAGS, 0);
<------>if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
<------><------><------>      (long) &mbname) != 0)
<------><------>mbname = "Unknown";
 
<------>/* find motherboard type */
<------>seq_printf(m, "machine\t\t: ");
<------>np = of_find_node_by_path("/");
<------>if (np != NULL) {
<------><------>pp = of_get_property(np, "model", NULL);
<------><------>if (pp != NULL)
<------><------><------>seq_printf(m, "%s\n", pp);
<------><------>else
<------><------><------>seq_printf(m, "PowerMac\n");
<------><------>pp = of_get_property(np, "compatible", &plen);
<------><------>if (pp != NULL) {
<------><------><------>seq_printf(m, "motherboard\t:");
<------><------><------>while (plen > 0) {
<------><------><------><------>int l = strlen(pp) + 1;
<------><------><------><------>seq_printf(m, " %s", pp);
<------><------><------><------>plen -= l;
<------><------><------><------>pp += l;
<------><------><------>}
<------><------><------>seq_printf(m, "\n");
<------><------>}
<------><------>of_node_put(np);
<------>} else
<------><------>seq_printf(m, "PowerMac\n");
 
<------>/* print parsed model */
<------>seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
<------>seq_printf(m, "pmac flags\t: %08x\n", mbflags);
 
<------>/* find l2 cache info */
<------>np = of_find_node_by_name(NULL, "l2-cache");
<------>if (np == NULL)
<------><------>np = of_find_node_by_type(NULL, "cache");
<------>if (np != NULL) {
<------><------>const unsigned int *ic =
<------><------><------>of_get_property(np, "i-cache-size", NULL);
<------><------>const unsigned int *dc =
<------><------><------>of_get_property(np, "d-cache-size", NULL);
<------><------>seq_printf(m, "L2 cache\t:");
<------><------>has_l2cache = 1;
<------><------>if (of_get_property(np, "cache-unified", NULL) && dc) {
<------><------><------>seq_printf(m, " %dK unified", *dc / 1024);
<------><------>} else {
<------><------><------>if (ic)
<------><------><------><------>seq_printf(m, " %dK instruction", *ic / 1024);
<------><------><------>if (dc)
<------><------><------><------>seq_printf(m, "%s %dK data",
<------><------><------><------><------>   (ic? " +": ""), *dc / 1024);
<------><------>}
<------><------>pp = of_get_property(np, "ram-type", NULL);
<------><------>if (pp)
<------><------><------>seq_printf(m, " %s", pp);
<------><------>seq_printf(m, "\n");
<------><------>of_node_put(np);
<------>}
 
<------>/* Indicate newworld/oldworld */
<------>seq_printf(m, "pmac-generation\t: %s\n",
<------><------>   pmac_newworld ? "NewWorld" : "OldWorld");
}
 
#ifndef CONFIG_ADB_CUDA
int find_via_cuda(void)
{
<------>struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");
 
<------>if (!dn)
<------><------>return 0;
<------>of_node_put(dn);
<------>printk("WARNING ! Your machine is CUDA-based but your kernel\n");
<------>printk("          wasn't compiled with CONFIG_ADB_CUDA option !\n");
<------>return 0;
}
#endif
 
#ifndef CONFIG_ADB_PMU
int find_via_pmu(void)
{
<------>struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");
 
<------>if (!dn)
<------><------>return 0;
<------>of_node_put(dn);
<------>printk("WARNING ! Your machine is PMU-based but your kernel\n");
<------>printk("          wasn't compiled with CONFIG_ADB_PMU option !\n");
<------>return 0;
}
#endif
 
#ifndef CONFIG_PMAC_SMU
int smu_init(void)
{
<------>/* should check and warn if SMU is present */
<------>return 0;
}
#endif
 
#ifdef CONFIG_PPC32
static volatile u32 *sysctrl_regs;
 
static void __init ohare_init(void)
{
<------>struct device_node *dn;
 
<------>/* this area has the CPU identification register
<------>   and some registers used by smp boards */
<------>sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);
 
<------>/*
<------> * Turn on the L2 cache.
<------> * We assume that we have a PSX memory controller iff
<------> * we have an ohare I/O controller.
<------> */
<------>dn = of_find_node_by_name(NULL, "ohare");
<------>if (dn) {
<------><------>of_node_put(dn);
<------><------>if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
<------><------><------>if (sysctrl_regs[4] & 0x10)
<------><------><------><------>sysctrl_regs[4] |= 0x04000020;
<------><------><------>else
<------><------><------><------>sysctrl_regs[4] |= 0x04000000;
<------><------><------>if(has_l2cache)
<------><------><------><------>printk(KERN_INFO "Level 2 cache enabled\n");
<------><------>}
<------>}
}
 
static void __init l2cr_init(void)
{
<------>/* Checks "l2cr-value" property in the registry */
<------>if (cpu_has_feature(CPU_FTR_L2CR)) {
<------><------>struct device_node *np;
 
<------><------>for_each_of_cpu_node(np) {
<------><------><------>const unsigned int *l2cr =
<------><------><------><------>of_get_property(np, "l2cr-value", NULL);
<------><------><------>if (l2cr) {
<------><------><------><------>ppc_override_l2cr = 1;
<------><------><------><------>ppc_override_l2cr_value = *l2cr;
<------><------><------><------>_set_L2CR(0);
<------><------><------><------>_set_L2CR(ppc_override_l2cr_value);
<------><------><------>}
<------><------><------>of_node_put(np);
<------><------><------>break;
<------><------>}
<------>}
 
<------>if (ppc_override_l2cr)
<------><------>printk(KERN_INFO "L2CR overridden (0x%x), "
<------><------>       "backside cache is %s\n",
<------><------>       ppc_override_l2cr_value,
<------><------>       (ppc_override_l2cr_value & 0x80000000)
<------><------><------><------>? "enabled" : "disabled");
}
#endif
 
static void __init pmac_setup_arch(void)
{
<------>struct device_node *cpu, *ic;
<------>const int *fp;
<------>unsigned long pvr;
 
<------>pvr = PVR_VER(mfspr(SPRN_PVR));
 
<------>/* Set loops_per_jiffy to a half-way reasonable value,
<------>   for use until calibrate_delay gets called. */
<------>loops_per_jiffy = 50000000 / HZ;
 
<------>for_each_of_cpu_node(cpu) {
<------><------>fp = of_get_property(cpu, "clock-frequency", NULL);
<------><------>if (fp != NULL) {
<------><------><------>if (pvr >= 0x30 && pvr < 0x80)
<------><------><------><------>/* PPC970 etc. */
<------><------><------><------>loops_per_jiffy = *fp / (3 * HZ);
<------><------><------>else if (pvr == 4 || pvr >= 8)
<------><------><------><------>/* 604, G3, G4 etc. */
<------><------><------><------>loops_per_jiffy = *fp / HZ;
<------><------><------>else
<------><------><------><------>/* 603, etc. */
<------><------><------><------>loops_per_jiffy = *fp / (2 * HZ);
<------><------><------>of_node_put(cpu);
<------><------><------>break;
<------><------>}
<------>}
 
<------>/* See if newworld or oldworld */
<------>ic = of_find_node_with_property(NULL, "interrupt-controller");
<------>if (ic) {
<------><------>pmac_newworld = 1;
<------><------>of_node_put(ic);
<------>}
 
<------>/* Lookup PCI hosts */
<------>pmac_pci_init();
 
#ifdef CONFIG_PPC32
<------>ohare_init();
<------>l2cr_init();
#endif /* CONFIG_PPC32 */
 
<------>find_via_cuda();
<------>find_via_pmu();
<------>smu_init();
 
#if IS_ENABLED(CONFIG_NVRAM)
<------>pmac_nvram_init();
#endif
#ifdef CONFIG_PPC32
#ifdef CONFIG_BLK_DEV_INITRD
<------>if (initrd_start)
<------><------>ROOT_DEV = Root_RAM0;
<------>else
#endif
<------><------>ROOT_DEV = DEFAULT_ROOT_DEVICE;
#endif
 
#ifdef CONFIG_ADB
<------>if (strstr(boot_command_line, "adb_sync")) {
<------><------>extern int __adb_probe_sync;
<------><------>__adb_probe_sync = 1;
<------>}
#endif /* CONFIG_ADB */
}
 
#ifdef CONFIG_SCSI
void note_scsi_host(struct device_node *node, void *host)
{
}
EXPORT_SYMBOL(note_scsi_host);
#endif
 
static int initializing = 1;
 
static int pmac_late_init(void)
{
<------>initializing = 0;
<------>return 0;
}
machine_late_initcall(powermac, pmac_late_init);
 
void note_bootable_part(dev_t dev, int part, int goodness);
/*
 * This is __ref because we check for "initializing" before
 * touching any of the __init sensitive things and "initializing"
 * will be false after __init time. This can't be __init because it
 * can be called whenever a disk is first accessed.
 */
void __ref note_bootable_part(dev_t dev, int part, int goodness)
{
<------>char *p;
 
<------>if (!initializing)
<------><------>return;
<------>if ((goodness <= current_root_goodness) &&
<------>    ROOT_DEV != DEFAULT_ROOT_DEVICE)
<------><------>return;
<------>p = strstr(boot_command_line, "root=");
<------>if (p != NULL && (p == boot_command_line || p[-1] == ' '))
<------><------>return;
 
<------>ROOT_DEV = dev + part;
<------>current_root_goodness = goodness;
}
 
#ifdef CONFIG_ADB_CUDA
static void __noreturn cuda_restart(void)
{
<------>struct adb_request req;
 
<------>cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
<------>for (;;)
<------><------>cuda_poll();
}
 
static void __noreturn cuda_shutdown(void)
{
<------>struct adb_request req;
 
<------>cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
<------>for (;;)
<------><------>cuda_poll();
}
 
#else
#define cuda_restart()
#define cuda_shutdown()
#endif
 
#ifndef CONFIG_ADB_PMU
#define pmu_restart()
#define pmu_shutdown()
#endif
 
#ifndef CONFIG_PMAC_SMU
#define smu_restart()
#define smu_shutdown()
#endif
 
static void __noreturn pmac_restart(char *cmd)
{
<------>switch (sys_ctrler) {
<------>case SYS_CTRLER_CUDA:
<------><------>cuda_restart();
<------><------>break;
<------>case SYS_CTRLER_PMU:
<------><------>pmu_restart();
<------><------>break;
<------>case SYS_CTRLER_SMU:
<------><------>smu_restart();
<------><------>break;
<------>default: ;
<------>}
<------>while (1) ;
}
 
static void __noreturn pmac_power_off(void)
{
<------>switch (sys_ctrler) {
<------>case SYS_CTRLER_CUDA:
<------><------>cuda_shutdown();
<------><------>break;
<------>case SYS_CTRLER_PMU:
<------><------>pmu_shutdown();
<------><------>break;
<------>case SYS_CTRLER_SMU:
<------><------>smu_shutdown();
<------><------>break;
<------>default: ;
<------>}
<------>while (1) ;
}
 
static void __noreturn
pmac_halt(void)
{
<------>pmac_power_off();
}
 
/* 
 * Early initialization.
 */
static void __init pmac_init(void)
{
<------>/* Enable early btext debug if requested */
<------>if (strstr(boot_command_line, "btextdbg")) {
<------><------>udbg_adb_init_early();
<------><------>register_early_udbg_console();
<------>}
 
<------>/* Probe motherboard chipset */
<------>pmac_feature_init();
 
<------>/* Initialize debug stuff */
<------>udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
<------>udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));
 
#ifdef CONFIG_PPC64
<------>iommu_init_early_dart(&pmac_pci_controller_ops);
#endif
 
<------>/* SMP Init has to be done early as we need to patch up
<------> * cpu_possible_mask before interrupt stacks are allocated
<------> * or kaboom...
<------> */
#ifdef CONFIG_SMP
<------>pmac_setup_smp();
#endif
}
 
static int __init pmac_declare_of_platform_devices(void)
{
<------>struct device_node *np;
 
<------>np = of_find_node_by_name(NULL, "valkyrie");
<------>if (np) {
<------><------>of_platform_device_create(np, "valkyrie", NULL);
<------><------>of_node_put(np);
<------>}
<------>np = of_find_node_by_name(NULL, "platinum");
<------>if (np) {
<------><------>of_platform_device_create(np, "platinum", NULL);
<------><------>of_node_put(np);
<------>}
        np = of_find_node_by_type(NULL, "smu");
        if (np) {
<------><------>of_platform_device_create(np, "smu", NULL);
<------><------>of_node_put(np);
<------>}
<------>np = of_find_node_by_type(NULL, "fcu");
<------>if (np == NULL) {
<------><------>/* Some machines have strangely broken device-tree */
<------><------>np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
<------>}
<------>if (np) {
<------><------>of_platform_device_create(np, "temperature", NULL);
<------><------>of_node_put(np);
<------>}
 
<------>return 0;
}
machine_device_initcall(powermac, pmac_declare_of_platform_devices);
 
#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
/*
 * This is called very early, as part of console_init() (typically just after
 * time_init()). This function is respondible for trying to find a good
 * default console on serial ports. It tries to match the open firmware
 * default output with one of the available serial console drivers.
 */
static int __init check_pmac_serial_console(void)
{
<------>struct device_node *prom_stdout = NULL;
<------>int offset = 0;
<------>const char *name;
#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
<------>char *devname = "ttyS";
#else
<------>char *devname = "ttyPZ";
#endif
 
<------>pr_debug(" -> check_pmac_serial_console()\n");
 
<------>/* The user has requested a console so this is already set up. */
<------>if (strstr(boot_command_line, "console=")) {
<------><------>pr_debug(" console was specified !\n");
<------><------>return -EBUSY;
<------>}
 
<------>if (!of_chosen) {
<------><------>pr_debug(" of_chosen is NULL !\n");
<------><------>return -ENODEV;
<------>}
 
<------>/* We are getting a weird phandle from OF ... */
<------>/* ... So use the full path instead */
<------>name = of_get_property(of_chosen, "linux,stdout-path", NULL);
<------>if (name == NULL) {
<------><------>pr_debug(" no linux,stdout-path !\n");
<------><------>return -ENODEV;
<------>}
<------>prom_stdout = of_find_node_by_path(name);
<------>if (!prom_stdout) {
<------><------>pr_debug(" can't find stdout package %s !\n", name);
<------><------>return -ENODEV;
<------>}
<------>pr_debug("stdout is %pOF\n", prom_stdout);
 
<------>if (of_node_name_eq(prom_stdout, "ch-a"))
<------><------>offset = 0;
<------>else if (of_node_name_eq(prom_stdout, "ch-b"))
<------><------>offset = 1;
<------>else
<------><------>goto not_found;
<------>of_node_put(prom_stdout);
 
<------>pr_debug("Found serial console at %s%d\n", devname, offset);
 
<------>return add_preferred_console(devname, offset, NULL);
 
 not_found:
<------>pr_debug("No preferred console found !\n");
<------>of_node_put(prom_stdout);
<------>return -ENODEV;
}
console_initcall(check_pmac_serial_console);
 
#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
 
/*
 * Called very early, MMU is off, device-tree isn't unflattened
 */
static int __init pmac_probe(void)
{
<------>if (!of_machine_is_compatible("Power Macintosh") &&
<------>    !of_machine_is_compatible("MacRISC"))
<------><------>return 0;
 
#ifdef CONFIG_PPC32
<------>/* isa_io_base gets set in pmac_pci_init */
<------>DMA_MODE_READ = 1;
<------>DMA_MODE_WRITE = 2;
#endif /* CONFIG_PPC32 */
 
<------>pm_power_off = pmac_power_off;
 
<------>pmac_init();
 
<------>return 1;
}
 
define_machine(powermac) {
<------>.name			= "PowerMac",
<------>.probe			= pmac_probe,
<------>.setup_arch		= pmac_setup_arch,
<------>.show_cpuinfo		= pmac_show_cpuinfo,
<------>.init_IRQ		= pmac_pic_init,
<------>.get_irq		= NULL,	/* changed later */
<------>.pci_irq_fixup		= pmac_pci_irq_fixup,
<------>.restart		= pmac_restart,
<------>.halt			= pmac_halt,
<------>.time_init		= pmac_time_init,
<------>.get_boot_time		= pmac_get_boot_time,
<------>.set_rtc_time		= pmac_set_rtc_time,
<------>.get_rtc_time		= pmac_get_rtc_time,
<------>.calibrate_decr		= pmac_calibrate_decr,
<------>.feature_call		= pmac_do_feature_call,
<------>.progress		= udbg_progress,
#ifdef CONFIG_PPC64
<------>.power_save		= power4_idle,
<------>.enable_pmcs		= power4_enable_pmcs,
#endif /* CONFIG_PPC64 */
#ifdef CONFIG_PPC32
<------>.pcibios_after_init	= pmac_pcibios_after_init,
<------>.phys_mem_access_prot	= pci_phys_mem_access_prot,
#endif
};

	// SPDX-License-Identifier: GPL-2.0-or-later
	/*
	* Powermac setup and early boot code plus other random bits.
	*
	* PowerPC version
	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	*
	* Adapted for Power Macintosh by Paul Mackerras
	* Copyright (C) 1996 Paul Mackerras (paulus@samba.org)
	*
	* Derived from "arch/alpha/kernel/setup.c"
	* Copyright (C) 1995 Linus Torvalds
	*
	* Maintained by Benjamin Herrenschmidt (benh@kernel.crashing.org)
	*/

	/*
	* bootup setup stuff..
	*/

	#include <linux/init.h>
	#include <linux/errno.h>
	#include <linux/sched.h>
	#include <linux/kernel.h>
	#include <linux/mm.h>
	#include <linux/stddef.h>
	#include <linux/unistd.h>
	#include <linux/ptrace.h>
	#include <linux/export.h>
	#include <linux/user.h>
	#include <linux/tty.h>
	#include <linux/string.h>
	#include <linux/delay.h>
	#include <linux/ioport.h>
	#include <linux/major.h>
	#include <linux/initrd.h>
	#include <linux/vt_kern.h>
	#include <linux/console.h>
	#include <linux/pci.h>
	#include <linux/adb.h>
	#include <linux/cuda.h>
	#include <linux/pmu.h>
	#include <linux/irq.h>
	#include <linux/seq_file.h>
	#include <linux/root_dev.h>
	#include <linux/bitops.h>
	#include <linux/suspend.h>
	#include <linux/of_device.h>
	#include <linux/of_platform.h>

	#include <asm/reg.h>
	#include <asm/sections.h>
	#include <asm/prom.h>
	#include <asm/io.h>
	#include <asm/pci-bridge.h>
	#include <asm/ohare.h>
	#include <asm/mediabay.h>
	#include <asm/machdep.h>
	#include <asm/dma.h>
	#include <asm/cputable.h>
	#include <asm/btext.h>
	#include <asm/pmac_feature.h>
	#include <asm/time.h>
	#include <asm/mmu_context.h>
	#include <asm/iommu.h>
	#include <asm/smu.h>
	#include <asm/pmc.h>
	#include <asm/udbg.h>

	#include "pmac.h"

	#undef SHOW_GATWICK_IRQS

	int ppc_override_l2cr = 0;
	int ppc_override_l2cr_value;
	int has_l2cache = 0;

	int pmac_newworld;

	static int current_root_goodness = -1;

	extern struct machdep_calls pmac_md;

	#define DEFAULT_ROOT_DEVICE Root_SDA1 /* sda1 - slightly silly choice */

	#ifdef CONFIG_PPC64
	int sccdbg;
	#endif

	sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
	EXPORT_SYMBOL(sys_ctrler);

	static void pmac_show_cpuinfo(struct seq_file *m)
	{
	<------>struct device_node *np;
	<------>const char *pp;
	<------>int plen;
	<------>int mbmodel;
	<------>unsigned int mbflags;
	<------>char* mbname;

	<------>mbmodel = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
	<------><------><------><------> PMAC_MB_INFO_MODEL, 0);
	<------>mbflags = pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL,
	<------><------><------><------> PMAC_MB_INFO_FLAGS, 0);
	<------>if (pmac_call_feature(PMAC_FTR_GET_MB_INFO, NULL, PMAC_MB_INFO_NAME,
	<------><------><------> (long) &mbname) != 0)
	<------><------>mbname = "Unknown";

	<------>/* find motherboard type */
	<------>seq_printf(m, "machine\t\t: ");
	<------>np = of_find_node_by_path("/");
	<------>if (np != NULL) {
	<------><------>pp = of_get_property(np, "model", NULL);
	<------><------>if (pp != NULL)
	<------><------><------>seq_printf(m, "%s\n", pp);
	<------><------>else
	<------><------><------>seq_printf(m, "PowerMac\n");
	<------><------>pp = of_get_property(np, "compatible", &plen);
	<------><------>if (pp != NULL) {
	<------><------><------>seq_printf(m, "motherboard\t:");
	<------><------><------>while (plen > 0) {
	<------><------><------><------>int l = strlen(pp) + 1;
	<------><------><------><------>seq_printf(m, " %s", pp);
	<------><------><------><------>plen -= l;
	<------><------><------><------>pp += l;
	<------><------><------>}
	<------><------><------>seq_printf(m, "\n");
	<------><------>}
	<------><------>of_node_put(np);
	<------>} else
	<------><------>seq_printf(m, "PowerMac\n");

	<------>/* print parsed model */
	<------>seq_printf(m, "detected as\t: %d (%s)\n", mbmodel, mbname);
	<------>seq_printf(m, "pmac flags\t: %08x\n", mbflags);

	<------>/* find l2 cache info */
	<------>np = of_find_node_by_name(NULL, "l2-cache");
	<------>if (np == NULL)
	<------><------>np = of_find_node_by_type(NULL, "cache");
	<------>if (np != NULL) {
	<------><------>const unsigned int *ic =
	<------><------><------>of_get_property(np, "i-cache-size", NULL);
	<------><------>const unsigned int *dc =
	<------><------><------>of_get_property(np, "d-cache-size", NULL);
	<------><------>seq_printf(m, "L2 cache\t:");
	<------><------>has_l2cache = 1;
	<------><------>if (of_get_property(np, "cache-unified", NULL) && dc) {
	<------><------><------>seq_printf(m, " %dK unified", *dc / 1024);
	<------><------>} else {
	<------><------><------>if (ic)
	<------><------><------><------>seq_printf(m, " %dK instruction", *ic / 1024);
	<------><------><------>if (dc)
	<------><------><------><------>seq_printf(m, "%s %dK data",
	<------><------><------><------><------> (ic? " +": ""), *dc / 1024);
	<------><------>}
	<------><------>pp = of_get_property(np, "ram-type", NULL);
	<------><------>if (pp)
	<------><------><------>seq_printf(m, " %s", pp);
	<------><------>seq_printf(m, "\n");
	<------><------>of_node_put(np);
	<------>}

	<------>/* Indicate newworld/oldworld */
	<------>seq_printf(m, "pmac-generation\t: %s\n",
	<------><------> pmac_newworld ? "NewWorld" : "OldWorld");
	}

	#ifndef CONFIG_ADB_CUDA
	int find_via_cuda(void)
	{
	<------>struct device_node *dn = of_find_node_by_name(NULL, "via-cuda");

	<------>if (!dn)
	<------><------>return 0;
	<------>of_node_put(dn);
	<------>printk("WARNING ! Your machine is CUDA-based but your kernel\n");
	<------>printk(" wasn't compiled with CONFIG_ADB_CUDA option !\n");
	<------>return 0;
	}
	#endif

	#ifndef CONFIG_ADB_PMU
	int find_via_pmu(void)
	{
	<------>struct device_node *dn = of_find_node_by_name(NULL, "via-pmu");

	<------>if (!dn)
	<------><------>return 0;
	<------>of_node_put(dn);
	<------>printk("WARNING ! Your machine is PMU-based but your kernel\n");
	<------>printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
	<------>return 0;
	}
	#endif

	#ifndef CONFIG_PMAC_SMU
	int smu_init(void)
	{
	<------>/* should check and warn if SMU is present */
	<------>return 0;
	}
	#endif

	#ifdef CONFIG_PPC32
	static volatile u32 *sysctrl_regs;

	static void __init ohare_init(void)
	{
	<------>struct device_node *dn;

	<------>/* this area has the CPU identification register
	<------> and some registers used by smp boards */
	<------>sysctrl_regs = (volatile u32 *) ioremap(0xf8000000, 0x1000);

	<------>/*
	<------> * Turn on the L2 cache.
	<------> * We assume that we have a PSX memory controller iff
	<------> * we have an ohare I/O controller.
	<------> */
	<------>dn = of_find_node_by_name(NULL, "ohare");
	<------>if (dn) {
	<------><------>of_node_put(dn);
	<------><------>if (((sysctrl_regs[2] >> 24) & 0xf) >= 3) {
	<------><------><------>if (sysctrl_regs[4] & 0x10)
	<------><------><------><------>sysctrl_regs[4] \|= 0x04000020;
	<------><------><------>else
	<------><------><------><------>sysctrl_regs[4] \|= 0x04000000;
	<------><------><------>if(has_l2cache)
	<------><------><------><------>printk(KERN_INFO "Level 2 cache enabled\n");
	<------><------>}
	<------>}
	}

	static void __init l2cr_init(void)
	{
	<------>/* Checks "l2cr-value" property in the registry */
	<------>if (cpu_has_feature(CPU_FTR_L2CR)) {
	<------><------>struct device_node *np;

	<------><------>for_each_of_cpu_node(np) {
	<------><------><------>const unsigned int *l2cr =
	<------><------><------><------>of_get_property(np, "l2cr-value", NULL);
	<------><------><------>if (l2cr) {
	<------><------><------><------>ppc_override_l2cr = 1;
	<------><------><------><------>ppc_override_l2cr_value = *l2cr;
	<------><------><------><------>_set_L2CR(0);
	<------><------><------><------>_set_L2CR(ppc_override_l2cr_value);
	<------><------><------>}
	<------><------><------>of_node_put(np);
	<------><------><------>break;
	<------><------>}
	<------>}

	<------>if (ppc_override_l2cr)
	<------><------>printk(KERN_INFO "L2CR overridden (0x%x), "
	<------><------> "backside cache is %s\n",
	<------><------> ppc_override_l2cr_value,
	<------><------> (ppc_override_l2cr_value & 0x80000000)
	<------><------><------><------>? "enabled" : "disabled");
	}
	#endif

	static void __init pmac_setup_arch(void)
	{
	<------>struct device_node cpu, ic;
	<------>const int *fp;
	<------>unsigned long pvr;

	<------>pvr = PVR_VER(mfspr(SPRN_PVR));

	<------>/* Set loops_per_jiffy to a half-way reasonable value,
	<------> for use until calibrate_delay gets called. */
	<------>loops_per_jiffy = 50000000 / HZ;

	<------>for_each_of_cpu_node(cpu) {
	<------><------>fp = of_get_property(cpu, "clock-frequency", NULL);
	<------><------>if (fp != NULL) {
	<------><------><------>if (pvr >= 0x30 && pvr < 0x80)
	<------><------><------><------>/* PPC970 etc. */
	<------><------><------><------>loops_per_jiffy = fp / (3 HZ);
	<------><------><------>else if (pvr == 4 \|\| pvr >= 8)
	<------><------><------><------>/* 604, G3, G4 etc. */
	<------><------><------><------>loops_per_jiffy = *fp / HZ;
	<------><------><------>else
	<------><------><------><------>/* 603, etc. */
	<------><------><------><------>loops_per_jiffy = fp / (2 HZ);
	<------><------><------>of_node_put(cpu);
	<------><------><------>break;
	<------><------>}
	<------>}

	<------>/* See if newworld or oldworld */
	<------>ic = of_find_node_with_property(NULL, "interrupt-controller");
	<------>if (ic) {
	<------><------>pmac_newworld = 1;
	<------><------>of_node_put(ic);
	<------>}

	<------>/* Lookup PCI hosts */
	<------>pmac_pci_init();

	#ifdef CONFIG_PPC32
	<------>ohare_init();
	<------>l2cr_init();
	#endif /* CONFIG_PPC32 */

	<------>find_via_cuda();
	<------>find_via_pmu();
	<------>smu_init();

	#if IS_ENABLED(CONFIG_NVRAM)
	<------>pmac_nvram_init();
	#endif
	#ifdef CONFIG_PPC32
	#ifdef CONFIG_BLK_DEV_INITRD
	<------>if (initrd_start)
	<------><------>ROOT_DEV = Root_RAM0;
	<------>else
	#endif
	<------><------>ROOT_DEV = DEFAULT_ROOT_DEVICE;
	#endif

	#ifdef CONFIG_ADB
	<------>if (strstr(boot_command_line, "adb_sync")) {
	<------><------>extern int __adb_probe_sync;
	<------><------>__adb_probe_sync = 1;
	<------>}
	#endif /* CONFIG_ADB */
	}

	#ifdef CONFIG_SCSI
	void note_scsi_host(struct device_node node, void host)
	{
	}
	EXPORT_SYMBOL(note_scsi_host);
	#endif

	static int initializing = 1;

	static int pmac_late_init(void)
	{
	<------>initializing = 0;
	<------>return 0;
	}
	machine_late_initcall(powermac, pmac_late_init);

	void note_bootable_part(dev_t dev, int part, int goodness);
	/*
	* This is __ref because we check for "initializing" before
	* touching any of the __init sensitive things and "initializing"
	* will be false after __init time. This can't be __init because it
	* can be called whenever a disk is first accessed.
	*/
	void __ref note_bootable_part(dev_t dev, int part, int goodness)
	{
	<------>char *p;

	<------>if (!initializing)
	<------><------>return;
	<------>if ((goodness <= current_root_goodness) &&
	<------> ROOT_DEV != DEFAULT_ROOT_DEVICE)
	<------><------>return;
	<------>p = strstr(boot_command_line, "root=");
	<------>if (p != NULL && (p == boot_command_line \|\| p[-1] == ' '))
	<------><------>return;

	<------>ROOT_DEV = dev + part;
	<------>current_root_goodness = goodness;
	}

	#ifdef CONFIG_ADB_CUDA
	static void __noreturn cuda_restart(void)
	{
	<------>struct adb_request req;

	<------>cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_RESET_SYSTEM);
	<------>for (;;)
	<------><------>cuda_poll();
	}

	static void __noreturn cuda_shutdown(void)
	{
	<------>struct adb_request req;

	<------>cuda_request(&req, NULL, 2, CUDA_PACKET, CUDA_POWERDOWN);
	<------>for (;;)
	<------><------>cuda_poll();
	}

	#else
	#define cuda_restart()
	#define cuda_shutdown()
	#endif

	#ifndef CONFIG_ADB_PMU
	#define pmu_restart()
	#define pmu_shutdown()
	#endif

	#ifndef CONFIG_PMAC_SMU
	#define smu_restart()
	#define smu_shutdown()
	#endif

	static void __noreturn pmac_restart(char *cmd)
	{
	<------>switch (sys_ctrler) {
	<------>case SYS_CTRLER_CUDA:
	<------><------>cuda_restart();
	<------><------>break;
	<------>case SYS_CTRLER_PMU:
	<------><------>pmu_restart();
	<------><------>break;
	<------>case SYS_CTRLER_SMU:
	<------><------>smu_restart();
	<------><------>break;
	<------>default: ;
	<------>}
	<------>while (1) ;
	}

	static void __noreturn pmac_power_off(void)
	{
	<------>switch (sys_ctrler) {
	<------>case SYS_CTRLER_CUDA:
	<------><------>cuda_shutdown();
	<------><------>break;
	<------>case SYS_CTRLER_PMU:
	<------><------>pmu_shutdown();
	<------><------>break;
	<------>case SYS_CTRLER_SMU:
	<------><------>smu_shutdown();
	<------><------>break;
	<------>default: ;
	<------>}
	<------>while (1) ;
	}

	static void __noreturn
	pmac_halt(void)
	{
	<------>pmac_power_off();
	}

	/*
	* Early initialization.
	*/
	static void __init pmac_init(void)
	{
	<------>/* Enable early btext debug if requested */
	<------>if (strstr(boot_command_line, "btextdbg")) {
	<------><------>udbg_adb_init_early();
	<------><------>register_early_udbg_console();
	<------>}

	<------>/* Probe motherboard chipset */
	<------>pmac_feature_init();

	<------>/* Initialize debug stuff */
	<------>udbg_scc_init(!!strstr(boot_command_line, "sccdbg"));
	<------>udbg_adb_init(!!strstr(boot_command_line, "btextdbg"));

	#ifdef CONFIG_PPC64
	<------>iommu_init_early_dart(&pmac_pci_controller_ops);
	#endif

	<------>/* SMP Init has to be done early as we need to patch up
	<------> * cpu_possible_mask before interrupt stacks are allocated
	<------> * or kaboom...
	<------> */
	#ifdef CONFIG_SMP
	<------>pmac_setup_smp();
	#endif
	}

	static int __init pmac_declare_of_platform_devices(void)
	{
	<------>struct device_node *np;

	<------>np = of_find_node_by_name(NULL, "valkyrie");
	<------>if (np) {
	<------><------>of_platform_device_create(np, "valkyrie", NULL);
	<------><------>of_node_put(np);
	<------>}
	<------>np = of_find_node_by_name(NULL, "platinum");
	<------>if (np) {
	<------><------>of_platform_device_create(np, "platinum", NULL);
	<------><------>of_node_put(np);
	<------>}
	np = of_find_node_by_type(NULL, "smu");
	if (np) {
	<------><------>of_platform_device_create(np, "smu", NULL);
	<------><------>of_node_put(np);
	<------>}
	<------>np = of_find_node_by_type(NULL, "fcu");
	<------>if (np == NULL) {
	<------><------>/* Some machines have strangely broken device-tree */
	<------><------>np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
	<------>}
	<------>if (np) {
	<------><------>of_platform_device_create(np, "temperature", NULL);
	<------><------>of_node_put(np);
	<------>}

	<------>return 0;
	}
	machine_device_initcall(powermac, pmac_declare_of_platform_devices);

	#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
	/*
	* This is called very early, as part of console_init() (typically just after
	* time_init()). This function is respondible for trying to find a good
	* default console on serial ports. It tries to match the open firmware
	* default output with one of the available serial console drivers.
	*/
	static int __init check_pmac_serial_console(void)
	{
	<------>struct device_node *prom_stdout = NULL;
	<------>int offset = 0;
	<------>const char *name;
	#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
	<------>char *devname = "ttyS";
	#else
	<------>char *devname = "ttyPZ";
	#endif

	<------>pr_debug(" -> check_pmac_serial_console()\n");

	<------>/* The user has requested a console so this is already set up. */
	<------>if (strstr(boot_command_line, "console=")) {
	<------><------>pr_debug(" console was specified !\n");
	<------><------>return -EBUSY;
	<------>}

	<------>if (!of_chosen) {
	<------><------>pr_debug(" of_chosen is NULL !\n");
	<------><------>return -ENODEV;
	<------>}

	<------>/* We are getting a weird phandle from OF ... */
	<------>/* ... So use the full path instead */
	<------>name = of_get_property(of_chosen, "linux,stdout-path", NULL);
	<------>if (name == NULL) {
	<------><------>pr_debug(" no linux,stdout-path !\n");
	<------><------>return -ENODEV;
	<------>}
	<------>prom_stdout = of_find_node_by_path(name);
	<------>if (!prom_stdout) {
	<------><------>pr_debug(" can't find stdout package %s !\n", name);
	<------><------>return -ENODEV;
	<------>}
	<------>pr_debug("stdout is %pOF\n", prom_stdout);

	<------>if (of_node_name_eq(prom_stdout, "ch-a"))
	<------><------>offset = 0;
	<------>else if (of_node_name_eq(prom_stdout, "ch-b"))
	<------><------>offset = 1;
	<------>else
	<------><------>goto not_found;
	<------>of_node_put(prom_stdout);

	<------>pr_debug("Found serial console at %s%d\n", devname, offset);

	<------>return add_preferred_console(devname, offset, NULL);

	not_found:
	<------>pr_debug("No preferred console found !\n");
	<------>of_node_put(prom_stdout);
	<------>return -ENODEV;
	}
	console_initcall(check_pmac_serial_console);

	#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */

	/*
	* Called very early, MMU is off, device-tree isn't unflattened
	*/
	static int __init pmac_probe(void)
	{
	<------>if (!of_machine_is_compatible("Power Macintosh") &&
	<------> !of_machine_is_compatible("MacRISC"))
	<------><------>return 0;

	#ifdef CONFIG_PPC32
	<------>/* isa_io_base gets set in pmac_pci_init */
	<------>DMA_MODE_READ = 1;
	<------>DMA_MODE_WRITE = 2;
	#endif /* CONFIG_PPC32 */

	<------>pm_power_off = pmac_power_off;

	<------>pmac_init();

	<------>return 1;
	}

	define_machine(powermac) {
	<------>.name = "PowerMac",
	<------>.probe = pmac_probe,
	<------>.setup_arch = pmac_setup_arch,
	<------>.show_cpuinfo = pmac_show_cpuinfo,
	<------>.init_IRQ = pmac_pic_init,
	<------>.get_irq = NULL, /* changed later */
	<------>.pci_irq_fixup = pmac_pci_irq_fixup,
	<------>.restart = pmac_restart,
	<------>.halt = pmac_halt,
	<------>.time_init = pmac_time_init,
	<------>.get_boot_time = pmac_get_boot_time,
	<------>.set_rtc_time = pmac_set_rtc_time,
	<------>.get_rtc_time = pmac_get_rtc_time,
	<------>.calibrate_decr = pmac_calibrate_decr,
	<------>.feature_call = pmac_do_feature_call,
	<------>.progress = udbg_progress,
	#ifdef CONFIG_PPC64
	<------>.power_save = power4_idle,
	<------>.enable_pmcs = power4_enable_pmcs,
	#endif /* CONFIG_PPC64 */
	#ifdef CONFIG_PPC32
	<------>.pcibios_after_init = pmac_pcibios_after_init,
	<------>.phys_mem_access_prot = pci_phys_mem_access_prot,
	#endif
	};